QCD with chiral 4-fermion interactions (χQCD)
J. B. Kogut, D. K. Sinclair
Abstract
Lattice QCD with staggered quarks is augmented by the addition of a chiral 4-fermion interaction. The Dirac operator is now non-singular at mq=0, decreasing the computing requirements for light quark simulations by at least an order of magnitude. We present preliminary results from simulations at finite and zero temperatures for mq=0, with and without gauge fields.
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